Nev Schulman, the host and executive producer of MTV’s “Catfish: The TV Show,” has been accused of sexual misconduct by a former cast member of the reality show. MTV has launched an investigation and has temporarily ceased production of the show.

Ayissha Morgan, who appeared on the show in 2015, recently posted a couple of videos on YouTube alleging sexual harassment against “Jack,” her pseudonym for Schulman, according to the Daily Beast.

In the first video, Morgan, a lesbian, alleged that Schulman tried to persuade her to “re-evaluate” her sexuality and have sex with him. In the other video, she claimed Schulman invited her to his hotel room and propositioned her the day after a female production assistant, “Carol,” allegedly took advantage of her after getting her drunk.

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“We take these allegations very seriously,” according to an MTV statement. “We’re working with Critical Content, our third party production company, to conduct a thorough investigation, and we’ve put a pause on shooting until the investigation is completed.”

“The behavior described in this video did not happen,” said Schulman, “and I’m fortunate that there are a number of former colleagues who were present during this time period who are willing to speak up with the truth. I have always been transparent about my life and would always take responsibility for my actions — but these claims are false.”